Expanded Form Worksheet
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Addition Problems in Expanded Form
Lesson
Problem Solving:
Finding What the Problem Is Asking For
Addition Problems in Expanded Form
Vocabulary
How do we use expanded form in addition?
place-value coins
We know that coins have different values. A penny is worth 1 cent,
and a dime is worth 10 cents. We can use place-value coins to help
show place value. Place-value coins are worth 1, 10, or 100.
We can show the number 32 as 3 tens coins and 2 ones coins.
Tens
Ones
32
10
10
10
1
1
When we add 3 to 32, we add 3 ones coins.
Tens
Ones
32
10
10
10
1
1
+ 3
1
1
1
The coins help us see the answer to 32 + 3 because they show place
value. We use the same thinking when we do addition in expanded form.
15
Unit 1 • Lesson 3
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